Adafruit 8-channel Bi-directional Level Converter - TXB0108


8.00 USD
$8.00 ea.
$7.20 ea.

Because the Arduino (and Basic Stamp) are 5V devices, and most modern sensors, displays, flash cards and modes are 3.3V-only, many makers find that they need to perform level shifting/conversion to protect the 3.3V device from 5V.

Description [Hide]

When making different devices talk, they can often be expecting/talking different voltages. This can be a bad thing, causing damaged chips that are being YELLED at by the more powerful device. You can make a simple converter with resistors and a transistor, but high speed transfers need cleaner signals than the resistor solution can offer.

That's where this lovely chip, the TXB0108 bi-directional level converter comes in! This chip perform bidirectional level shifting from pretty much any voltage to any voltage and will auto-detect the direction. Only thing that doesn't work well with this chip is i2c (because it uses strong pullups which confuse auto-direction sensor). If you need to use pullups, you can - but they should be at least 50K ohm, so the internal pullups in AVRs/Arduino will work fine.

Documentation [Hide]

You Might Also Like [Hide]


Logic Level Converter

The SparkFun logic level converter is a small device that safely steps down 5V signals to 3.3V and steps up 3.3V to 5V. This level converter also works with 2.8V and 1.8V devices.

$1.95 USD


Arduino Due

The long awaited ARM board by Arduino is finally here, now you can access higher level functionality while still using the wildly popular Arduino IDE.

$49.95 USD


3.3V Regulator TO-220 Pkg

Look, it's another voltage regulator! Look at it go! Vroom, vroom! (They go vroom, right?)

$2.05 USD


Breadboard Jumper Wire Bundle

This 70-piece flexible wire jumper kit is sure to replace your old-style solid-wire jumpers. These are more flexible, robust, and easy to use!

$6.00 USD


FTDI Basic Breakout (5V)

This is a basic breakout board for the FTDI FT232RL USB to serial IC. The pinout of this board matches the FTDI cable to work with official Arduino and cloned 5V Arduino boards.

$14.95 USD


Solarbotics Synapse-to-FTDI Adapter Kit

This board can do it all - breakout the Synapse RF module pins, give you a USB port/FTDI chip to program, supply it with a regulated 3.3V, integrate a reset switch (for updating & erasing), and also give you mounting options.

$22.95 USD


SparkFun USB to RS-485 Converter

This breakout board pairs an SP3485 RS-485 transceiver with an FT232RL USB UART IC to convert a USB stream to RS-485.

$19.95 USD


EFX-Tek RS-485 Adapter

The EFX-Tek RS-485 adapter is an ideal solution for putting multiple microcontrollers on a custom network.

$31.46 USD


The Mighty Mini Bundle

The Mighty Mini Bundle is basically an Arduino in its prime that has exercised... a lot! Not only is it skinny but it has the rated regulated power of 5 ordinary Arduinos (5 Amps) to back it up.

$31.00 USD


1.0F 2.5V Aerogel Super Capacitor

1 farad worth of storage in a tiny Aerogel capacitor. These are the latest in high-density power capacitors!

$5.00 USD





Remember Me

Forgot Your Password?

Don't Have an Account?
Sign Up!